JP3010318U - Drive device for motor with wire wound type rotation detector - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a motor for a motor with a wire-wound rotation detector, and more particularly, to a magnetic pole position using an induced voltage from a Y-type resistance bridge circuit connected to the wire-wound rotation detector. The purpose is to obtain data. [Structure] The winding type rotation detector equipped motor drive device according to the present invention includes an induced voltage from a Y-type resistance bridge circuit part (20) connected to the three-phase windings (3a to 3c) of the servomotor (3). (20
The magnetic pole position data (7a) is obtained based on E).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a motor for a motor with a wire-wound rotation detector, and more particularly to a novel device for obtaining magnetic pole position data by using an induced voltage from a Y-type resistance bridge circuit unit connected to the wire-wound rotation detector. Related to improvements.

[0002]

[Prior art]

 Conventionally, the structure shown in FIG. 2 has been adopted as a drive device for this type of winding type rotation detector equipped motor. That is, the one indicated by reference numeral 1 in FIG. 2 is the output signal corresponding to the three phases (iCOM × SINθ, iCOM × SINθ + 120 °, iCOM × SINθ + 240 °) in which the current command (iCOM) is input and the coordinates are converted. The output signal 1a is a three-phase AC coordinate converter that outputs 1a. The output signal 1a is input to a well-known pulse width modulation type PWM amplifier 2 via a subtractor 1A.

The three-phase drive signals 2a, 2b, 2c output from the PWM amplifier 2 are input to the three-phase U, V, W phase coils 3a, 3b, 3c of the AC servo motor 3, respectively. At the same time, the output 2Aa of the current sensor 2A is fed back to the subtractor 1A. The rotational position detection signal 5a (indicating the axial position of the servo motor 3) of the winding type rotational detector 5 composed of a resolver or the like connected to the rotational shaft 3A of the servo motor 3 via the subtractor 4 is the first analog signal. / A / D conversion is performed by the digital converter 6, and the axis position data 5aD of the servo motor 3 corresponding to the axis position is stored in the memory 7 including a well-known PROM.

Therefore, in the above-mentioned configuration, the axis position data 5aD stored in the memory 7 is read out from the memory 7 as the magnetic pole position data 7a and is input to the three-phase AC coordinate conversion unit 1 to generate the current command ( iCOM) is coordinate-converted by the magnetic pole position data 7a, and the three-phase output signal 1a is supplied to the PWM amplifier 2 via the divider 1A.

The three-phase drive signals 2a, 2b, 2c output from the PWM amplifier 2 are supplied to the respective phase coils 3a, 3b, 3c to drive the servo motor 3 in three phases.

[0006]

[Problems to be solved by the device]

 The conventional winding type motor with a rotation detector has the following problems because it is configured as described above. That is, if the motor shaft and the wire-wound rotation detector are connected with their axes displaced slightly, or if the reduction gear ratio of the reducer is changed, readjustment or resetting must be performed. , I had to create and write memory data.

The present invention has been made to solve the above problems, and in particular, magnetic pole position data is obtained by using an induced voltage from a Y-type resistance bridge circuit unit connected to a winding type rotation detector. It is an object of the present invention to provide a drive device for a motor with a wire-wound rotation detector designed to obtain the above.

[0008]

[Means for Solving the Problems]

 The winding type rotation detector motor driving device according to the present invention detects the axial position of the motor shaft of the servomotor by the winding type rotation detector, and uses the magnetic pole position data of the servomotor corresponding to the axis position, In a winding type rotation detector motor drive device in which a three-phase AC coordinate conversion of a current command is performed by a three-phase AC coordinate conversion unit to drive the servomotor, the motor is connected to the three-phase winding of the servomotor. The magnetic pole position data is obtained based on the induced voltage from the Y-type resistance bridge circuit section.

More specifically, a division unit connected to the Y-type resistance bridge circuit unit, a first analog / digital conversion unit connected to the winding type rotation detector and the division unit, and 1. A configuration in which a memory connected to an analog / digital conversion unit and a second analog / digital conversion unit connected to the memory and the division unit are provided, and the memory is connected to a three-phase alternating coordinate conversion unit Is.

[0010]

[Action]

 In the winding type rotation detector equipped motor drive device according to the present invention, the induced voltage generated from the Y-type resistance bridge circuit portion is detected when the motor shaft is rotated by an external force, and the magnetic pole obtained based on this induced voltage is detected. The position data can be stored in a memory, and when used, the magnetic pole position data read from this memory can be used to perform coordinate conversion in the three-phase AC coordinate conversion unit to drive and excite the three-phase winding of the servo motor.

[0011]

【Example】

 Hereinafter, a preferred embodiment of a drive device for a motor with a winding type rotation detector according to the present invention will be described in detail with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. In FIG. 1, the reference numeral 1 indicates the output signal 1a corresponding to the three phases (iCOM × SINθ, iCOM × SINθ + 120 °, iCOM × SINθ + 240 °) that have been input with the current command (iCOM) and have undergone coordinate transformation. The output signal 1a is a three-phase AC coordinate conversion unit for output, and is input to a well-known pulse width modulation type PWM amplifier 2 via a subtractor 1A.

The three-phase drive signals 2a, 2b, 2c output from the PWM amplifier 2 are input to the three-phase U, V, W phase coils 3a, 3b, 3c of the AC servo motor 3, respectively. At the same time, the output 2Aa of the current sensor 2A is fed back to the subtractor 1A. The rotational position detection signal 5a (indicating the axial position of the servo motor 3) of the winding type rotational detector 5 composed of a resolver or the like connected to the rotational shaft 3A of the servo motor 3 via the speed reducer 4 is the first analog signal. / A / D conversion is performed by the digital converter 6, and the axis position signal 5aD is input to the memory 7.

To the three-phase coils 3a, 3b, 3c of the servo motor 3, a Y-type resistance bridge circuit section 20 composed of three resistors R ₁ , R ₂ , R ₃ is connected, and the Y-type resistance bridge circuit section 20 is connected. The induced voltage 20E from the circuit portion 20 is three-phase {V _VE = KEω (SINθ), V _VE = KEω (SIN (θ + 120 °), V _WE = KEω (SIN (θ + 240 °))} Since the induced voltage 20E has the speed signal ω from the winding-type rotation detector 5, the speed signal ω is divided from the induced voltage 20E via the divider 21 to obtain a constant value. The magnetic pole position data 21a composed of the induced voltage signal of the gain can be obtained as the signal of the constant gain.The magnetic pole position data 21a from the division unit 21 is the axial position signal 5aD from the first analog / digital conversion unit 6. Address as It is stored in the memory 7 via the second analog / digital converter 30.

As described above, the magnetic pole position data 21 a stored in the memory 7 is read from the memory 7 after being set to be stored in the memory 7, and is input to the three-phase AC coordinate conversion unit 1 to generate 3 The AC coordinate conversion of the phases is performed, and the three-phase driving of the servomotor 3 can be performed as in the above-described conventional example.

[0015]

[Effect of device]

 Since the drive device for the motor with the winding type rotation detector according to the present invention is configured as described above, the following effects can be obtained. That is, since the magnetic pole position data is created based on the induced voltage from the Y-type resistance bridge circuit section of the servo motor connected to the servo motor, the magnetic pole position data is more accurate than the conventional configuration. Further, the time for creating and writing the magnetic pole position data becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing a driving device for a motor with a winding type rotation detector according to the present invention.

FIG. 2 is a block diagram showing a conventional configuration.

[Explanation of symbols]

 1 3 phase alternating current coordinate conversion part iCOM current command 3 servo motor 3a-3c 3 phase winding 5a axis position 6 1st analog / digital conversion part 7 memory 7a magnetic pole position data 20 Y type resistance bridge circuit part 21 division part 30 2nd Analog / digital converter

Claims (2)

[Scope of utility model registration request] 1. The winding position detector detects the shaft position (5a) of the motor shaft (3A) of the servomotor (3), and the magnetic pole position of the servomotor (3) corresponding to the shaft position (5a). A winding type rotation detector adapted to drive the servo motor (3) by using the data (7a) to perform the three-phase AC coordinate conversion of the current command (iCOM) in the three-phase AC coordinate conversion unit (1). A drive device for a built-in motor, comprising a Y-type resistance bridge circuit section (20) connected to the three-phase windings (3a to 3c) of the servo motor (3), the Y-type resistance bridge circuit section (20) A drive device for a motor with a winding type rotation detector, characterized in that the magnetic pole position data (7a) is obtained based on the induced voltage (20E) from the. 2. A division unit (21) connected to the Y-type resistance bridge circuit unit (20), and a first analog / circuit connected to the winding type rotation detector (5) and the division unit (21). A digital converter (6), a memory (7) connected to the first analog / digital converter (6), the memory (7) and the divider (21)
The winding type according to claim 1, further comprising a second analog / digital conversion unit (30) connected to the memory, and the memory (7) being connected to the three-phase AC coordinate conversion unit (1). Motor drive device with rotation detector.